Half-Life and Radioactive Decay

These flashcards cover key concepts of half-life and radioactive decay based on the notes provided.

What is half-life in the context of radioactive decay?

The time it takes for half of the radioactive nuclei in a sample to decay.

What percentage of a radioactive source remains after one half-life?

50% of the original amount remains.

If a radioactive source has a half-life of 29 years, how much of it will be left after 2 half-lives?

25% of the original amount will remain.

How much of the radioactive material is left after 3 half-lives?

12.5% of the original amount will remain.

What does the decay of Strontium-90 indicate about its half-life?

Strontium-90 has a half-life of 29 years.